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bitmaps patches for 2021-02-12

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- add 'transform' member to manipulate bitmaps across migration
 - work towards better error handling during bdrv_open
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Merge remote-tracking branch 'remotes/ericb/tags/pull-bitmaps-2021-02-12' into staging

bitmaps patches for 2021-02-12

- add 'transform' member to manipulate bitmaps across migration
- work towards better error handling during bdrv_open

# gpg: Signature made Fri 12 Feb 2021 23:19:39 GMT
# gpg:                using RSA key 71C2CC22B1C4602927D2F3AAA7A16B4A2527436A
# gpg: Good signature from "Eric Blake <eblake@redhat.com>" [full]
# gpg:                 aka "Eric Blake (Free Software Programmer) <ebb9@byu.net>" [full]
# gpg:                 aka "[jpeg image of size 6874]" [full]
# Primary key fingerprint: 71C2 CC22 B1C4 6029 27D2  F3AA A7A1 6B4A 2527 436A

* remotes/ericb/tags/pull-bitmaps-2021-02-12:
  block: use return status of bdrv_append()
  block: return status from bdrv_append and friends
  qemu-iotests: 300: Add test case for modifying persistence of bitmap
  migration: dirty-bitmap: Allow control of bitmap persistence
  migration: dirty-bitmap: Use struct for alias map inner members

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2021-02-13 21:26:00 +00:00
commit 392b9a74b9
11 changed files with 226 additions and 75 deletions
Download patch file Download diff file Expand all files Collapse all files

6
block/mirror.c
View file

@ -1569,7 +1569,6 @@ static BlockJob *mirror_start_job(
BlockDriverState *mirror_top_bs;
bool target_is_backing;
uint64_t target_perms, target_shared_perms;
Error *local_err = NULL;
int ret;
if (granularity == 0) {
@ -1618,12 +1617,11 @@ static BlockJob *mirror_start_job(
* it alive until block_job_create() succeeds even if bs has no parent. */
bdrv_ref(mirror_top_bs);
bdrv_drained_begin(bs);
bdrv_append(mirror_top_bs, bs, &local_err);
ret = bdrv_append(mirror_top_bs, bs, errp);
bdrv_drained_end(bs);
if (local_err) {
if (ret < 0) {
bdrv_unref(mirror_top_bs);
error_propagate(errp, local_err);
return NULL;
}